Does RV need to be level?

Question: Does it cause problems if the travel trailer is not level when the unit is parked and not in use?

Answer: We would make every effort to keep the RV level, to prevent any problems with the refrigerator. The one time we parked our RV for a few days in a slanted position, we had the refrigerator on propane and it did cause costly problems.

Perhaps it would not be an issue if the refrigerator was off, but we still tend to err on the side of prevention and keep a level position.

We welcome other thoughts.